A file comprising a report on British secret service arrangements in the event of war with Germany. The report lists the various routes by which information could be passed from German ports to Britain, and runs through the advantages and potential risks of placing British agents in Scandinavian and Dutch ports. It also discusses some of the necessary work and measures to be taken by the British agents to escape detection and execute their duties (including possible cover-stories), and provides detailed information on North Sea shipping and northern European rail services. There is also less detailed information on arrangements in Belgium for watching key German territory where troops may concentrate in the event of war, methods of communication for agents, and the cost of running agents.